Finding the Third Proportional to 58,987.50 and 128,341.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,987.50 : 128,341.50 = 128,341.50 : x
2. Step 2: Convert to fraction form
   58,987.50/128,341.50 = 128,341.50/x
3. Step 3: Cross multiply
   58,987.50x = 128,341.50 × 128,341.50
4. Step 4: Simplify right side
   58,987.50x = 16,471,540,622.25
5. Step 5: Solve for x
   x = 16,471,540,622.25/58,987.50
6. Step 6: Final answer
   x = 279,237.82